Crane.



.-ti'on the o truck, the supporting' Jframe for the crane THORVALD N. GARSON, OF GREENVILLE, NEW JERSEY.

CRANE.

Specification of Letters Patent.

Patented une 5, 1917.

Application flied September 13, 1916. Serial No. 119,816.

To all whom it may concern:

Be it known that I, THORVLD N. Grinsen, a citizen of the United States, residing at Greenvilleq in the county of Hudson and State oNeW Jersey, have invented certain new and useful Improvements in Cranes, of which the following is a speciiication.

This invention rela-tos to portable o eues, and has for its object to provide a lighh efficient and easily roiitrolled crane este cially. adapted for insisting and flistrilnitinyfr about the platform upon which it mounted, ay plurality oi" rr-ilaii'cly small but heavy packages or article `umh as castings und the like.,l the crane onine: so mounted and balanced thatnith its load it may be swung upon a bearing shaft by a single operator.

Inl'the drawings7 Figure l is a. diagrammatic plan View oi the inunoyements;

is a side elevation o'E the improve ments mounted upon a wheeled truck;

' 3 is a detail si-wtiimal 'View of the be-ar ng shaft and coimections; and

l Fig Pis 'zi detail sectional View of certain pari of 'tlie iunirro'veinents, including the hoisting drum and a rope guide employed therewith In the present emliodii'nent of the invernl i Ine is mounted upon a `Wheeled being disposed at the rear end of the truck @sofas to retain the maximum free space 1-thereon for the reception of the articles to be hoisted and transported. The support ino' frame for 'the crane comprises four or more s tandards. ,of which two, 1, 1x, aire illustrated in Fig. 2, the standards being connected at their upper ends bycross bars 2 upon which table 3. Secured on the upper surface oit the table is the flanged base of a bearingr block fl apertured to receive the. reduced lower cnd 5* of a vertical .shaft 5 which affords a bearing support for the elements of the crane. Surrounding the shaft and restinor upon thetop of block 4, is the hardened steel bearing disk 6 which serves as one of two ball retaining,r members,

a series oi" rollers o1.' ball hearings 'I being:

disposed intermediate its upper face and the second ball retainingr member 8, the latter beingr a. hardened steel. disk formed with a fiat upper surface for the reception of the lower l'n'aolret sleeve 9, the latter being formed with which serves as a protecting cap for the bearing disks. 'Bracket sleeve? is formed` depending flange 1Q' with a forwardly projectingr arm (L Which is apertured to receive the ulcrum pin 11 for the hoom 12. A'second arm b projects frearn'urdly from bracket sleeve 9 and has rlgidly secured thereto one or a plurality of.

horizontally disposed arms 13 `which carry the hoisting drum l-lund 'the motor 15 which drives the saine. Bracket sleeve 9 is coin'levted by marins of two plates 1G (one boing illustrated. in Fin'. Q) with an upper side lv caringr l? einhracing the shaft 5 and formed with a. cup to receive a lubricating compound 'Flair-s il extend above the hearing' i7 and are 'Formed with alined aperturc to receive the silpportingr pin 19 oi" a yf uiide wheel 2U for the hoisting rope fill, the latter being: led orer an idler pulley or shea-Te n at the cud of the boom, and at its rear end being); connected with drum 14C.'

The drum is driven b v the motor V15 through Worm and Worm wheel Q4, and. is covered by ay dust-proof casing C which serves as a, support for a guide roller o and acts to prevent the hoisting rope 21 from becoming displaced with .respect to the peripheral holding' face of the drum.

It will he seen from the foregoing, that the crane elements are so arranged with respect to lthe shaft 5' that the load may be moved about the shaft with slight effort on the part of the operator. This follows, because the hoisting drum, motor and driving elements, are mounted upon the bracket arm l) at one side oi" the shaft and the boom is mounted upon the bracket arm o at the 'opposite side ot theshaft so that the Weight of the load is balanced by the weight of the motor and drum. A handle .25 is secured to a bracket 26 on the. motor supporting frame so that the boom may be swung by the operator, and the handle also controls a locking pin 27 arranged to enter apertures 28 in a-segment bar 29 to hold the crane from turning when it is placed in a. desired position. To this end, the pin 2:( is carried by one end of the handle and ma y be elevated out of locking,r position by depression of the handle against the stress of'spring 29".

One of the primary objects of the invention is the provision of means whereby e single operator is enabled to hoisty and distribute about the truck platform longitudinally thereof` a. plurality of heavy articles, such as castings, and with the' employment yof a single drum and hoisting rope. To

both to hoist and lower the load and to control the elevated position of the boom; also means are provided for locking the boom. in the desired elevated position so that the hoisting rope may be lowered without at# fecting the position of the boom, as now to be described.

Secured upon Athelower face of the boom at its outer end is a wear guard 30 adapted to be engaged by a. ball or\other contact device 31 fixed upon the hoisting rope 21. When the load has been hoisted above the upperface of the truck, the hoisting rope in its continued movement will parry ball 31 into eontactwith the wear block, and

f further movement of the hoistingrope will cause said ball to lift the boom, as illustrated by dotted lines in Fig. 2. Assuming that the forward portion of the truck is coveredI with articles, the boom, by the aforesaid means, may be swun upwardly to carry the load rearwardly an "above a clear Space on the truck. Fixed upon the boom at its lower end is a ratchet disk 32 which is engaged by a pawl 33 supported'on one of the two plates 16. Pawl 33 is weighted at its outer end lso that it tends to swing into engagement with the teeth of ratchet disk 32 and to hold the boomagainst downward f movement, while permitting its upward movement. Thus, the boom is held in its elevated position and the mmfement ol drum lil may now be reversed to lower the hoisting rope and its load. A pull rod 351. is connected with the pawl so that the operator may move the latter out of engagement with the teeth. of ratchet disk 32 and permit the boom to be lowered.

What I claim and desire to secure by Letters Patent of the United States is In a crane the combination with a support, of a hoisting drum and driving means therefor, a boom pivotally mounted upon the support, a hoisting rope connected with the drum and led over the end. of the boom, a Contact device carried by the hoisting rope and adapted to engage the boom to elevate the same when the hoisting` rope is 'wound a. predetermined length on the drum, and two interengaging members :1t the hase of the boom for automa'tically7 locking latter in its elevated position to permit u. reverse movement of the hoisting rope, one of said members being carried b v the boom and the second member being carried by the support.

In testimony whereof I have hereunto signed my name in thepresence of two subscribing witnesses. THORVALD N. GR-ON.

. Witnesses:

W. LEE HELMS, A. C. Wmomms. 

